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4570355f8e
There can be multiple cases of handling the GSP RPC messages, which are the reply of GSP RPC commands according to the requirement of the callers and the nature of the GSP RPC commands. The current supported reply policies are "callers don't care" and "receive the entire message" according to the requirement of the callers. To introduce a new policy, factor out the current RPC command reply polices. Also, centralize the handling of the reply in a single function. Factor out NVKM_GSP_RPC_REPLY_NOWAIT as "callers don't care" and NVKM_GSP_RPC_REPLY_RECV as "receive the entire message". Introduce a kernel doc to document the policies. Factor out r535_gsp_rpc_handle_reply(). No functional change is intended for small GSP RPC commands. For large GSP commands, the caller decides the policy of how to handle the returned GSP RPC message. Cc: Ben Skeggs <bskeggs@nvidia.com> Cc: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Zhi Wang <zhiw@nvidia.com> Signed-off-by: Danilo Krummrich <dakr@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20250227013554.8269-2-zhiw@nvidia.com
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32 lines
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.. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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===============================
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drm/nouveau NVIDIA GPU Driver
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===============================
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The drm/nouveau driver provides support for a wide range of NVIDIA GPUs,
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covering GeForce, Quadro, and Tesla series, from the NV04 architecture up
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to the latest Turing, Ampere, Ada families.
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NVKM: NVIDIA Kernel Manager
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===========================
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The NVKM component serves as the core abstraction layer within the nouveau
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driver, responsible for managing NVIDIA GPU hardware at the kernel level.
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NVKM provides a unified interface for handling various GPU architectures.
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It enables resource management, power control, memory handling, and command
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submission required for the proper functioning of NVIDIA GPUs under the
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nouveau driver.
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NVKM plays a critical role in abstracting hardware complexities and
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providing a consistent API to upper layers of the driver stack.
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GSP Support
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------------------------
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.. kernel-doc:: drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
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:doc: GSP message queue element
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.. kernel-doc:: drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
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:doc: GSP message handling policy
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